The Object Debugger is a DrScheme tool distributed as a PLaneT package. To install the Object Debugger, a user must first download and install DrScheme. To add the Object Debugger from inside DrScheme, a user can execute this code in any of the PLT languages:
(require (planet "tool.ss" ("plt" "object-debugger.plt")))
The user must then close and restart DrScheme to use the Object Debugger.
For more information on installing and uninstalling PLaneT packages, look up PLaneT in the DrScheme Help Desk.